查詢 MySQL table 空間 語法

SELECT table_name, table_rows,
       IF(Index_length=0, Data_length, Data_length*Index_length) AS 'Table Size'
FROM information_schema.tables
WHERE table_schema='mk'
ORDER BY 'Table Size', table_rows DESC;

1.  mk 是資料庫名
2.  IF是判斷式，如果Index_length是0